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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div {
            font: size 50px;
            color: red;
            font-weight: 700;

            text-shadow: 5px 5px 6px rgba(0, 0, 0, .3);
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<body>
    <div>
        阴影
    </div>
</body>

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